Automatic welding device for movable arm plate of loading machine

The invention discloses an automatic welding device for a loader movable arm plate and relates to the technical field of loader movable arm welding, the automatic welding device comprises a base, a feeding table, a bottom plate and an arm plate clamping frame, supporting frames are fixedly connected to the two ends of the top of the base, a transmission belt is fixedly connected to the tops of the supporting frames, and the bottom plate is fixed to one end of the top of the base; the feeding table is fixed to the other end of the top of the base, a plurality of supporting columns are fixedly connected to the top end of the bottom plate, an arm plate clamping frame is connected to the tops of the supporting columns in an embedded mode, and after a base beam a is fixed through the base beam clamping frame and the base beam supporting frame, an arm plate is extruded and fixed through a first electric push rod and a first clamping plate in the arm plate clamping frame, so that the arm plate is attached to the bas